Thermal analysis of the Ca0.4Mm0.6Ni5 metal–hydride reactor

Kim, K.J.; Lloyd, George M.; Feldman, K.T.; Razani, A.

doi:10.1016/s1359-4311(98)00007-6

Cited by 39 publications

(11 citation statements)

References 9 publications

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“…In order to incorporate the effect of hysteresis and the plateau slope (which is present in both stages of the compression cycle) into the calculation of the plateau pressure Peq, the following equation was used [24,25] (8) where φs and φ0 describe the plateau flatness factors and S is the factor which can describes the hysteresis (lnPabs/Pdes). Furthermore '+' refers for the hydrogenation process, while '-' refers for the dehydrogenation process and x and xsat are the hydrogen concentration at any given time and fully saturated.…”

Section: Equilibrium Pressurementioning

confidence: 99%

Metal hydride hydrogen compression: recent advances and future prospects

et al. 2016

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OF THE MANUSCRIPTMetal hydride (MH) thermal sorption compression is one of the more important applications of the metal hydrides. The present paper reviews recent advances in the field based on the analysis of the fundamental principles of this technology. The performances when boosting hydrogen pressure, along with two-and three-step compression units are analyzed. The paper includes also a theoretical modeling of a two-stage compressor aimed at both describing the performance of the experimentally studied systems, but, also, on their optimization and design of more advanced MH compressors. Business developments in the field are reviewed for the Norwegian company HYSTORSYS AS and the South African Institute for Advanced Materials Chemistry. Finally, future prospects are outlined presenting the role of the metal hydride compression in the overall development of the hydrogen driven energy systems. The work is based on the analysis of the development of the technology in Europe, USA and South Africa.

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Section: Equilibrium Pressurementioning

confidence: 99%

Metal hydride hydrogen compression: recent advances and future prospects

et al. 2016

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“…al., 1998aKim et. al., , 1998bKim et. al., , 1998cHouston and Sanrock, 1980;Shahinpoor and Kim, 2002].…”

Section: Operating Principlementioning

confidence: 99%

High Performance Heat Storage and Dissipation Technology

Park

Gottschlich

Leland

2005

Heat Transfer, Part A

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High power solid state laser systems operating in a pulse mode dissipate the transient and excessively large waste heat from the laser diode arrays and gain material. The heat storage option using Phase Change Materials (PCMs) has been considered to manage such peak heat loads not relying on oversized systems for real-time cooling. However, the PCM heat storage systems suffer from the low heat storage densities and poor thermal conductivities of the conventional PCMs, consequently requiring large PCM volumes housed in thermal conductors such as aluminum or graphite foams. We developed a high performance metal hydride heat storage system for efficient and passive acquisition, storage, transport and dissipation of the transient, high heat flux heat from the high power solid state laser systems. The greater volumetric heat storage capacity of metal hydrides than the conventional PCMs can be translated into very compact systems with shorter heat transfer paths and therefore less thermal resistance. Other exclusive properties of the metal hydride materials consist of fast thermal response and active cooling capability required for the precision temperature control and transient high heat flux cooling. This paper discusses the operating principle and heat storage performance results of the metal hydride heat storage system through system analysis and prototype testing. The results revealed the superior heat storage performance of the metal hydride system to a conventional PCM system in terms of temperature excursion and system volume requirement.

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“…For the 26 salts studied in that work, the maximum mechanical COP that can be reached is 4.4 with a compression ratio of 6.6. One of these salts is further explored in [6] and corroborate the theoretical evaluation of the specific cooling capacity, but the COP has not been experimentally determined. A similar compressor implementation has been experimentally studied in [7], [8].…”

Section: Introductionmentioning

confidence: 99%